Collapsible pallet container

ABSTRACT

The invention relates to a collapsible superstructure ( 30 ), a frame system ( 20 ), a lid ( 40 ) and a load handling system in the form of a pallet ( 10 ) with other components thereon. The superstructure ( 30 ) comprises a downward-extending protrusion in the corner portions ( 33   a - d ) for forming a step which is arranged to interact with an edge of a downward-extending recess of the pallet ( 10 ) on which the superstructure ( 30 ) is intended to be placed. When the superstructure ( 30 ) is in a partly raised upright position on the pallet ( 10 ), each corner portion ( 33   a - d ) can be pushed outward so that the protrusion can drop down into each recess of the pallet ( 10 ). The collapsible sides ( 32   a - b ) comprise respective lower locking portions arranged to interact with a locking portion of the pallet ( 10 ) in such a way that, when the superstructure ( 30 ) is in a partly raised upright position on the pallet ( 10 ), the locking portion of the superstructure ( 30 ) can pass an edge of the locking portion of the pallet ( 10 ) in an outward movement (L) and thereby enable the superstructure ( 30 ) to place itself in a fully raised position.

TECHNICAL FIELD

The present invention relates to a collapsible superstructure for apallet. The collapsible superstructure comprises a first pair of sidesand a second pair of sides, the sides being arranged, in a raisedposition of the superstructure, to be upright in such a way that thesides of the first pair are opposite each other, the sides of the secondpair are opposite each other and the sides of the first pair areconnected to the sides of the second pair in order, in a raised positionof the superstructure, to form a superstructure in the shape of arectangular cuboid with four upright corner portions. Each one of thesides of the second pair is divided into two parts that are connected toa first hinge joint which is upright in a raised position of thesuperstructure, and the superstructure is provided with, in a raisedposition of the superstructure, upright second hinge joints arranged atthe corner portions so that said parts of the sides of the second pairare foldable in relation to the side of the first pair to which eachpart of the sides of the second pair is connected.

The present invention also relates to a frame system arranged to be usedfor securing a rectangular, collapsible superstructure having twoopposite collapsible sides on a rectangular pallet with four lateraledges.

The present invention also relates to a lid arranged to be used on topof a rectangular, collapsible superstructure having two oppositecollapsible sides arranged on a pallet.

The present invention also relates to a load handling system comprisinga pallet provided with a frame system, preferably also provided with asuperstructure and more preferably also provided with a lid.

BACKGROUND OF THE INVENTION

A collapsible superstructure is for instance described in WO2013/126011A1. The advantage of a pallet system with collapsible superstructures isthat when the pallet is to be returned without any load, thesuperstructure can be folded and put aside flat on the pallet so that ittakes up minimal space. The superstructure has a first pair of oppositesides (long sides) and a second pair of opposite sides (short sides).The pallet is provided with upright corner portions which are fastenedto the long sides. The short sides are connected to each corner portionvia an upright hinge joint and are each divided into two parts which arereciprocally connected to an upright central hinge joint so that eachone of the short sides can be folded inward in order to fold the entiresuperstructure. The different sides of the superstructure are providedwith hatches. In order to keep the hatches closed, the superstructure isalso provided with hatch locks. The system comprises a pallet, asuperstructure and a lid. The lid comprises an outer flange, all aroundthe circumference, and an inner lowered portion. Consequently, a Ushaped groove is formed in which the upper edge of the superstructureextends when the lid is fitted onto the superstructure.

It is desirable for this type of system that it is easy to manufacture,that the components are easy to handle and that the system provides astable design.

SUMMARY OF THE INVENTION

One object of the invention is to provide a system which is simple tomanufacture. Another object of the invention is to provide a designwhich enables easy handling of the components. An additional object ofthe invention is to provide a stable design.

These objects are achieved with a superstructure, a frame system, a lidand a complete system comprising a pallet provided with a frame system,preferably also provided with a superstructure and more preferably alsoprovided with a lid of the type which is identified in each independentclaim.

According to one aspect of the invention, the invention relates to asuperstructure of the type stated in the introduction, characterised bythe superstructure in each of the four corner portions comprising aprotrusion which in a raised position of the superstructure extendsbelow a connecting portion of the protrusion so that the protrusion inrelation to the connecting portion forms a downward-extending step,

wherein the connecting portion is formed as a part of the corner portionor of a connecting portion of each corner portion of, in a raisedposition of the superstructure, a lower edge portion of each side of thesecond pair,

wherein said step is arranged to interact with an edge of adownward-extending recess of the pallet on which the superstructure isintended to be placed in such a way that, when the superstructure is ina partly raised upright position on the pallet, each corner portion canbe pushed outward so that the protrusion can drop down into respectiverecess of the pallet when the superstructure places itself partly orfully in a raised position, and in such a way that, when thesuperstructure is placed with its protrusions in the recesses of thepallet, the interaction between the step formed by the protrusion of thesuperstructure and the edge of the recess of the pallet prevents eachcorner portion from being inadvertently pushed inward along theextension of the sides of the second pair, and

each one of the sides of the second pair comprises a locking portionwithin, in a raised position of the superstructure, the lower edgeportion of each side,

wherein the locking portion is arranged to interact with a lockingportion of a pallet on which the superstructure is intended to be placedin such a way that, when the superstructure is in a partly raisedupright position on the pallet, the superstructure locking portion maypass an edge of the pallet locking portion in an outward movement andthereby enable the superstructure to place itself in a fully raisedposition, and in such a way that, when the superstructure is in a fullyraised position, the interaction between the superstructure lockingportion and the pallet locking portion prevents each hinge joint betweenthe parts of the second pair from being inadvertently pushed inward,

wherein the locking portion is designed, in a raised position of thesuperstructure, as a downward-extending locking protrusion, and isarranged, when the superstructure is in a fully raised position, to beable to drop down into and interact with a recess of the pallet on whichthe superstructure is intended to be placed, or is formed by the loweredge portion having an edge which is arranged, when the superstructureis moved from a partly raised upright position to a fully raisedposition, to be able to pass across in an outward movement and drop downonto the outside of an upward-extending protrusion of the pallet onwhich the superstructure is intended to be placed.

As will be seen from the description of the various features, a user canraise the superstructure to an upright but only partly raised position.A first level of an upright but only partly raised position relates to aposition when the corner portions of the superstructure are at a certaindistance from their final positions and when the sides of the secondpair are folded to a certain extent. A second level of an upright butonly partly raised position is when the corner portions are pushed outso that the protrusions of the superstructure pass the edge of therecesses of the pallet (or the frame system) and drop down into therecesses, but that the sides of the second pair are folded to a certainextent. In a fully raised position, the centre portion of the othersides is also pushed out so that the locking portion of the other sidesinteract with the locking portion of the pallet (or the frame system).The user can also choose to push out in the middle of the other sides sothat the locking portion of the other sides engages with the lockingportion of the pallet (or the frame system) at the same time as thestraightening of the other sides forces the corner portions to engagewith the recesses of the pallet (or the frame system). The designenables the user to raise the superstructure in separate steps and theuser receives distinct feedback with regards to when the superstructureis truly in its fully raised position. The corner portions will dropdown a millimetre or two during engagement between the protrusions andrecesses and distinct feedback is thereby provided. During engagementbetween the protrusions and recesses, the locking portions will causethe centre portion of each other side to drop down a millimetre or twoand distinct feedback is thereby provided. When folding thesuperstructure, it is easy for the user to release the locking portionsand start folding the sides of the second pair; it is also easy for theuser to lift the corner portions past the edges of the recesses and toput the superstructure in a partly raised upright position.

It should be noted that the rectangular shape of the superstructure andthe pallet in this context may relate to a rectangle where the sides ofthe first pair have a length which is different from the length of thesides of the second pair. According to one preferred embodiment of thisvariant with sides of different lengths, the sides of the first pair arelonger than the sides of the second pair. The rectangular form may alsorelate to the special form of a rectangle where the sides of the firstpair are the same length as the sides of the second pair, i.e. a squareform.

Preferred embodiments of the invention are set forth in the dependentclaims.

The locking portions of the superstructure are advantageously arrangedin a centre portion of each side of the second pair, wherein the centreportion relates to a portion which comprises the positions that arecloser to the first hinge joint of each side than the second hingejoints of each side. By placing the locking portions in the centreportion, the locking portions can provide distinct feedback in a simpleway and the locking portions will directly act on the centre portionwhich is to be prevented from being moved inadvertently. In addition,slight bending inward of the inner hinge joint of the respective otherside is sufficient to release the locking portions since the lockingportions, thanks to their location in the centre portion, provide alarge relative displacement when bending the parts of each side of thesecond pair inward.

According to a preferred embodiment, the superstructure comprisesprotrusions and locking portions for engaging with a lid. Thesuperstructure in each of the four corner portions comprises aprotrusion which in a raised position of the superstructure extendsabove a connecting portion of the protrusion so that the protrusion inrelation to the connecting portion forms an upward-extending step,

wherein the connecting portion is formed as a part of the corner portionor of a connecting portion of each corner portion of, in a raisedposition of the superstructure, an upper edge portion of each side ofthe second pair,

wherein said step is arranged to interact with an edge of anupward-extending recess of a lid which is intended to be placed on thesuperstructure in such a way that, when the lid is placed with thesuperstructure protrusion in the recess of the lid, the interactionbetween the step formed by the superstructure protrusion and the edge ofthe lid recess prevents each corner portion from being inadvertentlypushed inward along the extension of the sides of the second pair, and

each one of the sides of the second pair comprises a locking portionwithin, in a raised position of the superstructure, the upper edgeportion of each side,

wherein the locking portion is arranged to interact with a lockingportion of the lid which is intended to be placed on the superstructurein such a way that, when the superstructure is in a fully raisedposition, the interaction between the superstructure locking portion andthe lid locking portion prevents each hinge joint between the parts ofthe second pair from being inadvertently pushed inward,

wherein the locking portion is formed, in a raised position of thesuperstructure, as an upward-extending locking protrusion, and isarranged, when the superstructure is in the fully raised position, to beable to extend up into and to interact with a recess of the lid which isintended to be placed on the superstructure, or formed by the upper edgeportion having an edge which is arranged to extend up on the outside ofa downward-extending protrusion of the lid which is intended to beplaced on the superstructure.

At first, the user will raise the superstructure to a fully raisedposition with the lower protrusions engaged to the recesses of thepallet (or the frame system) and the lower locking portions engaged withthe locking portions of the pallet (or the frame system). Then the userwill place a lid on top of the fully raised superstructure. Thesuperstructure has on its top protrusions and locking portionscorresponding to those on the underside. The lid is provided with outerlimiting surfaces arranged to be located on the outside of thesuperstructure when the lid is correctly positioned. The lid also hasupward-extending recesses arranged to interact with the upperprotrusions of the superstructure. The lid also has locking portionsarranged to interact with the locking portions of the superstructure.The lid has no flanges or similar that extend down on the inside of thesides of the superstructure. Owing to the lid not having any flanges andthanks to it being provided with recesses and locking portions andthrough the superstructure having the described upper protrusions andupper locking portions, it is easy for the user to place the lid on thesuperstructure. For example, the user can put the lid on at an angle orthrow the lid onto the superstructure and then adjust it to the correctposition so that protrusions and recesses and locking portions arecorrectly engaged with each other. When it is finally in the correctposition, the lid will help to keep the superstructure in the correctposition in the same way that the pallet (or frame system) keeps thesuperstructure in the correct position. Consequently, both the lower andthe upper part of the superstructure will be kept in the fully raisedposition.

According to one aspect of the invention, the invention relates to aframe system arranged to be used for securing a rectangular, collapsiblesuperstructure having two opposite collapsible sides on a rectangularpallet with four lateral edges.

The frame system comprises four recesses in which each is arranged to bepositioned in a respective corner of the pallet, which recesses extenddown to form an upward-extending edge from the recess base, wherein theedge is arranged to allow a protrusion of a corner portion of asuperstructure to pass the edge so that the recess can receive theprotrusion when the superstructure is in an upright partly or fullyraised position, and which edge is arranged, when the protrusion isreceived in the recess, to interact with the protrusion and to preventthe protrusion and the corner portion from being inadvertently pushedinward along the collapsible sides of the superstructure,

two locking portions arranged to be located at two opposite lateraledges of the pallet, along which two lateral edges the collapsible sidesof the superstructure are intended to be located,

wherein the locking portions are designed with an edge and arranged tointeract with locking portions of each of the collapsible sides of thesuperstructure which is intended to be placed on the pallet in such away that, when the superstructure is in a partly raised upright positionon the pallet, the superstructure locking portion can pass the edge ofthe frame system locking portion in an outward movement and therebyenable the superstructure to place itself in a fully raised position,and in such a way that, when the superstructure is in a fully raisedposition, the interaction between the edge of the frame system lockingportion and the superstructure locking portion prevents thesuperstructure collapsible sides from being inadvertently pushed inward,

wherein the locking portions for forming said edge are formed asdownward-extending recesses for forming an upward-extending edge fromthe base of each recess, wherein each edge is arranged to allow adownward-extending locking protrusion of each collapsible side of thesuperstructure which is intended to be placed on the pallet to pass theedge so that the recess can receive the locking protrusion when thesuperstructure places itself in the fully raised position, or formed asupward-extending protrusions, wherein each protrusion is arranged, whenthe superstructure is moved from a partly raised upright position to afully raised position, to allow a lower edge portion of thesuperstructure to pass across the protrusion in an outward movement andto drop down onto the outside of the protrusion, which outside of theprotrusion forms said edge which prevents the collapsible sides of thesuperstructure from being inadvertently pushed inward.

The advantages of the various features have been discussed thoroughly inconnection with corresponding features of the superstructure. The framesystem can be an integrated part of a pallet or a separate systemarranged to be fastened onto a pallet.

Preferred embodiments are set forth in the dependent claims.

Preferably, the locking portions of the frame system are arranged to belocated in a centre portion of each lateral edge of the pallet, whereinthe centre portion relates to a portion which comprises the positionswhich are closer to the centre of each lateral edge than the end pointsof each lateral edge. As mentioned in connection with the correspondingfeatures of the superstructure, this positioning in the centre portionprovides distinct feedback and in addition, the locking portions willdirectly act on the centre portion which is to be prevented from beingmoved inadvertently. In addition, slight bending inward of the innerhinge joint of the respective other side is sufficient to release thelocking portions since the locking portions, thanks to their location inthe centre portion, provide a large relative displacement when bendingthe parts of each side of the second pair inward.

Preferably, the frame system is formed in two separate parts which areeach arranged to be fastened on a pallet, wherein each one of the partscomprises two corner wall portions and a locking portion arranged inbetween these corner wall portions. In this way, it is possible toprovide various types of pallets with a frame system using the samecomponents, as long as the side which is to receive each part has thesame length. For example, this can be used to provide full and semipallets with a frame system structured by the same components. Inaddition, it has been found that by dividing the frame system into twoseparate parts, the frame system is relatively unaffected by carelesshandling. A frame system in one part has a tendency to be deformed ifhandled carelessly, in such a way that, small displacements aretransmitted and that the entire frame takes on a parallelogram form,which makes it difficult to place a superstructure and lid on thesuperstructure. By separating the frame system into two parts, thistransmission of displacements is avoided. In addition, an inadvertentdisplacement of one part is easily corrected without the correctionaffecting other parts. Dividing the frame system into two separate partsalso has the advantage that there is no need for an edge or similar toextend along the long sides of the pallet. In this way, it is simpler toaccess a superstructure which is placed in a flat folded position on thepallet.

Preferably, the frame system is formed with four corner wall portions,which each one is arranged to be located in a respective corner of thepallet, and each one comprises a first wall portion which is arranged toextend along at least a part of one of the lateral edges that meet inthe corner in which the corner wall portion is located, and a secondwall portion which is arranged to extend along at least a part of thesecond of the lateral edges that meet in the corner in which the cornerwall portion is located, wherein the wall portions are arranged to forma physical outer, geometrically rectangular limitation on horizontaldisplacements of a superstructure arranged on the pallet.

When the superstructure is in a fully raised position, the recesses willretain the superstructure in place. In connection with raising thesuperstructure, it is preferable that the user is able to push one ofthe corners outward to abut with the corner wall portions in the currentcorner so that the protrusion of the superstructure drops down into therecess and then pushes other corners to each respective corner.

The corner wall portions also provide a cover against inadvertentimpacts which could damage the superstructure or cause thesuperstructure to fall out of the recesses. In addition, the corner wallportions are formed with a height which is higher than the height of acollapsed superstructure laid on its side. In this way, the collapsedsuperstructure can be put on the pallet with the lid put on top and becarried by the corner wall portions and thereby protect thesuperstructure lying on its side.

According to one aspect of the invention, the invention relates to a lidarranged to be used on top of a rectangular, collapsible superstructurehaving two opposite collapsible sides arranged on a pallet.

The lid comprises four recesses, each one arranged to be located in arespective corner of the superstructure as to receive upward-extendingprotrusions of the superstructure, which recesses extend upward in orderto form a downward-extending edge from the top of the recess, whereinthe edge is arranged to interact with the protrusion when the protrusionis received in the recess and to prevent the protrusion and the cornerportion from being inadvertently pushed inward along the collapsiblesides of the superstructure,

two locking portions arranged to be located at the two oppositecollapsible sides of the superstructure,

wherein the locking portions are formed with an edge and are arranged tointeract with locking portions of each respective collapsible side ofthe superstructure on which the lid is intended to be placed in such away that, when the superstructure is in a fully raised position, theinteraction between the edge of the locking portion of the lid and thelocking portion of the superstructure prevents the collapsible sides ofthe superstructure from being inadvertently pushed inward,

wherein the locking portions for forming said edge are formed as anupward-extending recess for forming a downward-extending edge from eachtop of the respective recess, or formed as downward-extendingprotrusions, wherein an outside of the protrusion forms said edge whichprevents the collapsible sides of the superstructure from beinginadvertently pushed inward.

The advantages of the various features have been discussed thoroughly inconnection with corresponding features of the superstructure. Asmentioned above in connection with a preferred embodiment of thesuperstructure, the user will first raise the superstructure to a fullyraised position with the lower protrusions engaged to the recesses ofthe pallet (or the frame system) and the lower locking portions engagedwith the locking portions of the pallet (or the frame system). Then theuser will place a lid on top of the fully raised superstructure. Thesuperstructure has on its top protrusions and locking portionscorresponding to those on the underside. The lid is provided with outerlimiting surfaces arranged to be located on the outside of thesuperstructure when the lid is correctly positioned. The lid also hasupward-extending recesses arranged to interact with the upperprotrusions of the superstructure. The lid also has locking portionsarranged to interact with the locking portions of the superstructure.The lid has no flanges or similar that extend down on the inside of thesides of the superstructure. Owing to the lid not having any flanges andthanks to it being provided with recesses and locking portions andthrough the superstructure having the described upper protrusions andupper locking portions, it is easy for the user to place the lid on thesuperstructure. For example, the user can put the lid on at an angle orthrow the lid onto the superstructure and then adjust it to the correctposition so that protrusions and recesses and locking portions arecorrectly engaged with each other. When it is finally in the correctposition, the lid will help to keep the superstructure in the correctposition in the same way that the pallet (or frame system) keeps thesuperstructure in the correct position. Consequently, both the lower andthe upper part of the superstructure will be kept in the fully raisedposition.

Preferred embodiments of the lid are set forth in the dependent claims.

Preferably, the locking portions of the lid are arranged to be locatedin a centre portion of each collapsible side of the superstructure,wherein the centre portion relates to a portion which comprises thepositions which are closer to the centre of each side than the endpoints of each side. As mentioned above, this is advantageous withrespect to distinct feedback and direct action on the centre portionwhich is to be prevented from being moved inadvertently. In addition,slight bending inward of the inner hinge joint of the respective otherside is sufficient to release the locking portions since the lockingportions, thanks to their location in the centre portion, provide alarge relative displacement when bending the parts of each side of thesecond pair inward.

Preferably, the lid is provided with four corner wall portions which areeach arranged to be located in a respective corner of thesuperstructure, and which each comprise a first wall portion which isarranged to extend along at least a part of one of the sides of thesuperstructure that meet in the corner in which the corner wall portionis located, and a second wall portion which is arranged to extend alongat least a part of the second of the sides of the superstructure thatmeet in the corner in which the corner wall portion is located, whereinthe wall portions are arranged to form a physical outer, geometricallyrectangular limitation on outward skewing for the corner portions of thesuperstructure.

According to one aspect of the invention, the invention relates to aload handling system comprising a pallet of the above-mentioned type,provided with a frame system of the above-mentioned type. Preferably,the load handling system also comprises a superstructure of theabove-mentioned type. More preferably, the load handling system alsocomprises a lid of the above-mentioned type.

It should also be noted that the various features described as parts ofthe frame system, such as the recesses and the corner portions, may bearranged on different components that are arranged to be put together.For example, the recesses forming the steps can be arranged as a part ofthe pallet while the corner wall portions may be part of a frame system.For example, such a structure can be appropriate if the pallet ismanufactured from plastics and if a frame system is placed on top of thepallet. The recesses and their edges may be formed, for example, as anintegral part of the loading surface of the pallet. The pallet with itsrecesses together with the frame system and its corner wall portionswill then provide a solution which corresponds to the solution providedby a frame system with both recesses and corner wall portions.

It should also be noted that although it is preferable that the lid isof the above-mentioned type, it is not necessary for the lid to be ofthis type. A design where the frame system and the superstructure are ofthe above-mentioned type but where the lid does not have recesses withthe above-mentioned edges may also be envisaged. For example, the lidmay be formed with a downward edge all the way around. When the userputs the lid on the superstructure, this can be achieved by the lidengaging one edge and sliding along one of the upper edges of thesuperstructure so that the downward edges on each side of the lid guidethe lid laterally. When the rear downward edge of the lid receives theupper edge of the superstructure along which the lid slides, the usercan drop the edge which the user had hold of and the lid will then sitwith its downward edges around and outside the superstructure andthereby be kept in place. A lid formed in this way may be provided withthe above-mentioned locking portions, although this is not necessary.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in more detail below with reference to theaccompanying schematic drawings which, for the purposes of illustration,show a presently preferred embodiment of the invention.

FIG. 1 shows a pallet with a frame system and a superstructure placed onthe pallet and a lid placed on the superstructure.

FIG. 2 shows a pallet with a frame system and a superstructure placed onthe pallet (in a fully raised position).

FIG. 3 shows a pallet with a frame system and a superstructure placed onthe pallet (in an upright but only partly raised position).

FIG. 4 shows a pallet with a frame system.

FIG. 5 shows two details which form a part of a frame system.

FIG. 6 shows a corner of the frame system and of the superstructure.

FIG. 7 shows a plane projection of a superstructure.

FIG. 8 shows an enlargement of the corner portions shown in FIG. 7.

FIG. 9 shows an enlargement of a centre portion shown in FIG. 7.

FIG. 10 shows the same enlargement as in FIG. 9 but with the screw andwasher removed.

FIG. 11 shows a detail corresponding to FIG. 5 according to analternative embodiment.

FIG. 12 shows a section according to section marking shown in FIG. 11.

FIG. 13 shows a corner of the lid placed on a corner portion of thesuperstructure.

FIG. 14 shows an exploded view of the corner shown in FIG. 13.

FIG. 15 shows a corner of the lid placed on a corner portion of thesuperstructure corresponding to FIG. 13 but with the corner part of thelid removed.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

As will be seen from FIGS. 1-4, the loading system 1 comprises a pallet10, a frame system 20, a superstructure 30 and a lid 40. Thesuperstructure 30 is, as will be seen in FIG. 3, collapsible. Thesuperstructure 30 comprises a first pair of sides 31 a-b and a secondpair of sides 32 a-b. When the superstructure is in a fully raisedposition, as in FIG. 2, the sides 31 a-b, 32 a-b are arranged to beupright in such a way that, the sides 31 a-b of the first pair areopposite each other, and the sides 32 a-b of the second pair areopposite each other, and the sides 31 a-b of the first pair areconnected to the sides 32 a-b of the second pair so that thesuperstructure 30 forms a superstructure in the shape of a rectangularcuboid with four upright corner portions 33 a-d. Each one of the sides32 a-b of the second pair is divided into two parts, 32 a′ and 32 a″ or32 b′ and 32 b″ respectively, which are connected to a first hinge joint34 a-b, which is upright in a raised position of the superstructure. Thesuperstructure 30 further comprises, as will be seen in FIG. 3, in araised position of the superstructure 30, upright second hinge joints 35a-d arranged at the corner portions 33 a-d so that said parts 32 a′ and32 a″ or 32 b′ and 32 b″, respectively, of the sides 312 a-b of thesecond pair are foldable in relation to the side of the first pair towhich each part of the sides of the second pair is connected. Part 32 a″is for example foldable in relation to the side 31 b thanks to the hingejoint 35 a. The second hinge joints 35 a-d are placed so that the cornerportions 33 a-d are fixed in relation to the sides 31 a-b of the firstpair of opposite sides. The second hinge joints are placed so that theparts 32 a′ and 32 a″ or 32 b′ and 32 b″, respectively, of the secondpair of opposite sides are foldable in relation to the corner portions33. The second hinge joints 35 a-d are placed in the connection betweenthe corner portions 33 a-d and the parts 32 a′ and 32 a″ or 32 b′ and 32b″, respectively, of the second pair of opposite sides.

As will be seen from FIGS. 6-8, the superstructure 30 comprises, in eachof the four corner portions 33 a-d, a downward-extending protrusion 36a-d. The superstructure 30 also comprises, in each of the four cornerportions 33 a-d, an upward-extending protrusion 37 a-d. FIG. 2 shows allfour upward-extending protrusions 37 a-d. There is a downward-extendingprotrusion 36 a-d at each of the corner portions 33 a-d in the same way.FIGS. 6-8 show a couple or only one such protrusion in more detail.

Each downward-extending protrusion 36 a-d extends, as will be seen inFIG. 8, in a raised position of the superstructure 30, below aconnecting portion 32 b″ of the protrusion 36 so that the protrusion 36a in relation to the connecting portion 32 b″ forms a downward-extendingstep 38 a-d with a height d. The connecting portion may be a part of thecorner portion. In such a design, the protrusion 36 a-d only extendsacross a part of the corner portion 33 a-d as is indicated by the dottedline marked 38 c′ in FIG. 8, and the part of the protrusion that ismarked 36 c′ in FIG. 8 is removed or at least of a shorter extensiondownward so that it forms a step at the line 38 c′.

In the embodiment shown in the drawings, the connecting portion isformed by a connecting portion of each corner portion 33 a-d, in araised position of the superstructure, by a lower edge portion (see 32b′ in FIG. 8) of each side 32 a′ and 32 a″ or 32 b′ and 32 b″ of thesecond pair respectively.

Each step 38 a-d is arranged to interact with an edge 21 a-d of adownward-extending recess 22 a-d of the pallet 10 on which thesuperstructure 30 is intended to be placed. Each step 38 a-d is arrangedto interact with a respective edge 21 a-d in such a way that, when thesuperstructure 30 is in a partly raised upright position (as in FIG. 3)on the pallet 10, the respective corner portion 33 a-d can be pushedoutward so that the protrusion 37 a-d can drop down into the respectiverecess 22 a-d when the superstructure 30 places itself in a partly orfully raised position.

Each step 38 a-d is arranged to interact with a respective edge 21 a-din such a way that, when the superstructure 30 is placed with itsprotrusions 37 a-d in the recesses 22 a-d of the pallet 10, theinteraction between the step 38 a-d, which is formed by the protrusion37 a-d of the superstructure 30, and the edge 21 a-d of the recess 22a-d of the pallet 10 prevents a respective corner portion 33 a-d frombeing inadvertently pushed inward along the extension T of the sides 32a-b of the second pair. The corner portions 33 a-d in FIG. 3 are bydesign moved inward in the direction T in relation to FIG. 2.

Each one of the sides 32 a-b of the second pair comprises a lockingportion 39 a, 39 c, in a raised position of the superstructure, in thelower edge portion of each side 32 a-b. In addition, there arecorresponding locking portions 39 b, 39 d in an upper edge portion ofeach side 32 a-b. The location of the upper locking portions 39 b, 39 dis shown in FIGS. 2 and 3. As will be seen in FIG. 7, there is a lowerlocking portion 39 a corresponding to the upper locking portion 39 b.Correspondingly, there is a lower locking portion 39 c corresponding tothe upper locking portion 39 d.

Each locking portion 39 a, 39 c is arranged to interact with a lockingportion 23; 23′ of the pallet 10 on which the superstructure 30 isintended to be placed. Each locking portion 39 a, 39 c is arranged tointeract with each locking portion 23; 23′ in such a way that, when thesuperstructure 30 is in a partly raised upright position (as in FIG. 3)on the pallet 10, the locking portion 39 a, 39 c of the pallet 30 canpass an edge 23 b of the locking portion 23 of the pallet 10 in anoutward movement L and thereby enable the superstructure 30 to placeitself in a fully raised position.

Each locking portion 39 a, 39 c is arranged to interact with arespective locking portion 23; 23′ in such a way that, when thesuperstructure 30 is in a fully raised position, the interaction betweenthe locking portion 39 a, 39 c of the superstructure 30 and the lockingportion 23 of the pallet 10 prevents a respective hinge joint 34 a, 34 bbetween the parts 32 a′ and 32 a″ or 32 b′ and 32 b″, respectively, ofthe second pair 32 a-b from being inadvertently pushed inward (counterto the arrows L in FIG. 3).

The locking portion 39 a, 39 c of the superstructure 30 is, according toone variant, formed, in a raised position of the superstructure, as adownward-extending locking protrusion 39 a, 39 c. As is shown in FIG. 9,the locking protrusion is advantageously a screw 39 d. In addition,there is a washer 39 d′ between the hinge joint 34 a and the head of thescrew 39 d. The locking protrusion 39 a, 39 c is arranged, when thesuperstructure 30 places itself in a fully raised position, to drop downinto and interact with a recess 23 of the pallet 10 on which thesuperstructure 30 is intended to be placed.

The locking portion is, according to another variant, formed such thatthe lower edge portion 39 a′ and/or 39 a″ has an edge which is arranged,when the superstructure 30 is moved from a partly raised uprightposition to a fully raised position, to be able to pass across in anoutward movement L and drop down onto the outside of an upward-extendingprotrusion 23′ (see FIGS. 11 and 12) of the pallet 10 on which thesuperstructure 30 is intended to be placed. In the figures, only theedge portions 39 a′ and 39 a″ of the parts 32 b′ and 32 b″ are shown,but there are corresponding edge portions to the parts 32 a′ and 32 a″.The upward-extending protrusion 23′ may, for example, be a bulge whichis provided by locally pushing the material upward. As will be seen inFIG. 12, the form is such that the inclination is less in an outwarddirection (L) and greater in an inward direction (counter to L), so thata distinct edge 23 b is formed which prevents inadvertent pushing inwardbut which makes it easy to raise the superstructure to a fully raisedposition.

The locking portions 39 a, 39 c, 39 a′, 39 a″ of the superstructure 30are arranged in a centre portion at each side 32 a-b of the second pair,wherein the centre portion relates to a portion which comprises thepositions which are closer to the first hinge joint 34 a and 34 b ofeach side 32 a or 32 b than the second hinge joints 35 a-d of each side.

As mentioned above, the superstructure 30 in each of the four cornerportions 33 a-d comprises a protrusion 37 a-d which, in a raisedposition of the superstructure, extends above a connecting portion ofthe protrusion so that the protrusion in relation to the connectingportion forms an upward-extending step 37 a-d′ (37 c′ is shown in FIG.8). Correspondingly, as for the downward-extending protrusions, theconnecting portion may be formed as a part of the corner portion or as aconnecting portion of each corner portion, in a raised position of thesuperstructure, of an upper edge portion of each side of the secondpair. The latter variant is shown in FIG. 8 by the protrusion 37 c andthe part 32 b′.

The step 37 a-d′ is arranged to interact with an edge 41 a-d of anupward-extending recess of a lid 40 which is intended to be placed onthe superstructure 30. The step 37 a-d′ is arranged to interact with theedge 41 a-d in such a way that, when the lid 40 is placed with theprotrusions 37 a-d of the superstructure 30 in the recesses of the lid40, the interaction between the step 37 a-d′, which is formed by theprotrusion 37 a-d of the superstructure 30, and the edge 41 a-d of therecess of the lid 40 prevents a respective corner portion 33 a-d of thesuperstructure 30 from being inadvertently pushed inward along theextension T of the sides 32 a-b of the second pair.

Each one of the sides 32 a-b of the second pair comprises a lockingportion 39 b, 39 d within, in a raised position of the superstructure30, within the upper edge portion of each side 32 a-b. Each lockingportion 39 b, 39 d is arranged to interact with a locking portion of thelid 40 which is intended to be placed on the superstructure 30 in such away that, when the superstructure is in a fully raised position, theinteraction between the locking portion 39 b, 39 d of the superstructure30 and the locking portion of the lid 40 prevents a respective hingejoint 34 a-b between the parts 32 a′ and 32 a″ or 32 b′ and 32 b″,respectively, of the second pair from being inadvertently pushed inward(counter to the direction L in FIG. 3).

According to a variant, the locking portion 39 b, 39 d is formed, in araised position of the superstructure, as an upward-extending lockingprotrusion (see 39 d in FIG. 9), and is arranged, when thesuperstructure is in a fully raised position, to be able to extendupward into and interact with a recess of the lid 40 which is intendedto be placed on the superstructure 30. The recess of the lid 40 isadvantageously a hole or a recess located in the same way and in thecorresponding location as the recess 23 in FIG. 5.

According to a variant, the locking portion 39 b, 39 d is formed by theupper edge portion having an edge which is arranged to extend upwardonto the outside of a downward-extending protrusion of the lid which isintended to be placed on the superstructure. This corresponds to thelower edge portion 39 c and the protrusion 23′. For an explanation ofthe appearance and the function, reference should be made to the part ofthe description which relates to these.

In the complete system, the pallet 10 carries a frame system 20 which isarranged to secure the collapsible superstructure 30. The frame system20 may be integrated in the pallet 10, but it may also be formed by oneor more separate parts which can be fastened on any chosen pallet 10. Inthe description of the superstructure 30, the various recesses of thepallet have been described in detail. If the pallet is provided with aseparate frame system or if a separate frame system is sold forretrofitting on a pallet, it is the frame system which comprises therecesses and the locking portions described as parts of the pallet inthe description above.

The locking portions 23; 23′ of the frame system 20 are arranged to belocated in a centre portion of each lateral edge of the pallet 10,wherein the centre portion relates to a portion which comprises thepositions which are closer to the centre of each lateral edge than theend points of each lateral edge.

The frame system 20 is formed in two separate parts 20 a-b, which areeach arranged to be fastened on a pallet 10. Each one of the parts 20a-b comprises two corner wall portions 24 a′ and 24 a″ or 24 b′ and 24b″, respectively, and a locking portion 23, 24 arranged in between thesecorner wall portions.

Each separate part 20 a-b may, as shown in FIG. 5, in turn be formed byseveral parts. In the embodiment shown, the part 20 a, as will be seenin FIG. 5, is divided into two parts 20 a′ and 20 a″. The part 20 a′ isintended to be placed on top of part 20 a″. The recess 23 is formed bypart 20 a′ being provided with a through-hole. In this way, the upperside of part 20 a″ will form a base of the recess 23. The hole edge inpart 20 a′ will form the edge 23 a-b. Correspondingly, the recesses inthe corners of the pallet are formed by a part 22 d of part 20 a′ beingremoved. In this way, the upper side of part 20 a″ will form the base ofthe recesses. The hole edge in part 20 a′ will form the edge 21 a-d.

Each of the four corner wall portions 24 a′ and 24 a″ or 24 b′ and 24b″, respectively, of the frame system 20 is arranged to be placed in arespective corner of the pallet. Each of the four corner wall portions24 a′ and 24 a″ or 24 b′ and 24 b″, respectively, of the frame system 20comprises a first wall portion 25 a which is arranged to extend along atleast a part of one of the lateral edges which meet in the corner inwhich the corner wall portion is located, and a second wall portion 25b, which is arranged to extend along at least a part of the second ofthe lateral edges which meet in the corner in which the corner wallportion is located.

The load handling system also comprises, as mentioned above, a lid 40arranged to be used on top of a rectangular, collapsible superstructure30, arranged on a pallet, with two opposite collapsible sides 32 a-b.

In the same way as the frame system 20 comprises recesses and lockingportions, the lid also comprises recesses and locking portions.

The lid 40 has four recesses which are each arranged to be located in arespective corner of the superstructure, which recesses extend upward inorder to form a downward-extending edge (see 41 b in FIG. 14) from thetop of the recess, wherein the edge is arranged to interact with theprotrusion when the protrusion is received in the recess and to preventthe protrusion and the corner portion from being inadvertently pushedinward along the collapsible sides of the superstructure. The lid 40 iscomposed of four corner parts 42 a-d, four elongated profiles 43 a-d anda plate 44. The corner parts 42 a-d have fingers which are arranged toextend into the end points of the profiles 43 a-d as shown in FIG. 14.The corner parts 42 a-d have a flat underside (same level on the centrepart as on the fingers). Since the corner part 42 b is pushed into theprofiles, the underside of the corner part will form a top in the recessand the material thickness of the profiles underneath the plate willform the step 41 b. The corner plate 42 b has a dimension along the sidesurfaces which is slightly greater than the protrusion 37 b whichprotrudes up from the superstructure.

In summary, the superstructure can be described as a superstructurewhich comprises a downward-extending protrusion in each corner portionfor forming a step which is arranged to interact with an edge of adownward-extending recess of the pallet on which the superstructure isintended to be placed. When the superstructure is in a partly raisedupright position on the pallet, each corner portion can be pushedoutward so that the protrusion can drop down into each recess of thepallet. The collapsible sides comprise respective locking portionsarranged to interact with a locking portion of the pallet in such a waythat, when the superstructure is in a partly raised upright position onthe pallet, the locking portion of the superstructure can pass an edgeof the locking portion of the pallet in an outward movement and therebyenable the superstructure to place itself in a fully raised position.

It will be appreciated that a number of modifications of the embodimentsof the invention described herein are possible within the scope of theinvention, which is defined in the following patent claims.

For example, the pallet may be made of other materials and be of otherdesigns than what is described. The pallet may, for example, be made ofplastic or wood. The pallet may be made of metal but with a differentdesign. Since the frame system comprises the recesses with which thesuperstructure interacts, it is sufficient that the pallet can carry thedesired weight and load and that it is possible to fasten the framesystem on the pallet in a satisfactory manner. According to analternative, the pallet can be formed so that it in itself has a surfacein which recesses are formed so that the recesses and the adjacent partof the surface form the edges of the recesses. In such a design, theframe system does not need to comprise recesses, instead the framesystem can in such a case mainly be formed in order to provide thesystem with corner wall portions.

The superstructure may be formed from other materials and be of otherdesigns than what is described.

The superstructure is formed from extruded aluminium in the embodimentshown. The corner portions are extruded in their longitudinal direction(vertical direction for an upright superstructure).

The side surfaces are extruded in the direction which is indicated bythe stripes on the side surfaces. The collapsible sides are extruded inthe direction which becomes a vertical direction for an uprightsuperstructure. The fixed sides are extruded in the direction whichbecomes a horizontal direction for an upright superstructure.

The superstructure may, for example, be made of sheet metal which hasadvantageously been bent in a wave pattern for increased stiffness. Thesuperstructure may also be made of plastic, laminate sheets, or othermaterial. A variant is that the superstructure is formed with cornerpillars of metal and that the side plates are formed of another materialwhich, for example, is cheaper and has a lower load-bearing capacity.

In the embodiment shown, the superstructure protrusions at the cornerportions are made of plastic. They can be made of metal or othermaterials.

In the embodiment shown, the superstructure's protruding lockingportions (in the middle of the foldable sides) are formed by screws (ofmetal) screwed into the hinge joint. These protruding portions can bemade of other materials. For example, they can be made of plastic. Theycan also be made of a mixture of different materials. For example, itcould be envisaged that they are formed as an annular plastic knobscrewed securely by means of a sunken metal screw in the plastic knob.The plastic knob will glide across the frame system and drop down intothe recesses in the frame system. The metal screw in the middle willeffectively retain the plastic knob in relation to the hinge joint.

1. A collapsible superstructure for a pallet, comprising: (a) a firstpair of sides and a second pair of sides, the sides being arranged, in araised position of the superstructure, to be upright in such a way that:the sides of the first pair are opposite each other; the sides of thesecond pair are opposite each other; and the sides of the first pair areconnected to the sides of the second pair in a raised position of thesuperstructure in order to form a superstructure in the shape of arectangular cuboid with four upright corner portions; (b) each one ofthe sides of the second pair being divided into two parts that areconnected to a first hinge joint, which is upright in a raised positionof the superstructure; (c) the superstructure being provided with, in araised position of the superstructure, upright second hinge jointsarranged at the corner portions so that said parts of the sides of thesecond pair are foldable in relation to the side of the first pair towhich each part of the sides of the second pair is connected; (d) eachof the four corner portions comprising a protrusion which in a raisedposition of the superstructure extends below (d) a connecting portion ofthe protrusion so that the protrusion in relation to the connectingportion forms a downward-extending step; (e) the connecting portionbeing formed as a part of the corner portion or of a connecting portionof each corner portion of, in a raised position of the superstructure, alower edge portion of each side of the second pair; (f) the step beingarranged to interact with an edge of a downward-extending recess of thepallet on which the superstructure is intended to be placed in such away that, when the superstructure is in a partly raised upright positionon the pallet, each corner portion can be pushed outward so that theprotrusion can drop down into a respective recess of the pallet when thesuperstructure is placed partly or fully in a raised position, and insuch a way that, when the superstructure is placed with its protrusionsin the recesses of the pallet, the interaction between the step formedby the protrusion of the superstructure and the edge of the recess ofthe pallet prevents each corner portion from being inadvertently pushedinward along the extension of the sides of the second pair; (g) each oneof the sides of the second pair comprising a locking portion within, ina raised position of the superstructure, the lower edge portion of eachside; (h) the locking portion being arranged to interact with a lockingportion of the pallet on which the superstructure is intended to beplaced in such a way that, when the superstructure is in a partly raisedupright position on the pallet, the locking portion of thesuperstructure is able to pass an edge of the locking portion of thepallet in an outward movement and thereby enable the superstructure toplace itself in a fully raised position, and in such a way that, whenthe superstructure is in a fully raised position, the interactionbetween the superstructure locking portion and the pallet lockingportion prevents each hinge joint between the parts of the second pairfrom being inadvertently pushed inward; and (i) the locking portionbeing designed, in a raised position of the superstructure, as adownward-extending locking protrusion and being arranged, when thesuperstructure is in a fully raised position, to be able to drop downinto and interact with a recess of the pallet on which thesuperstructure is intended to be placed, or being formed by the loweredge portion having an edge which is arranged, when the superstructureis moved from a partly raised upright position to a fully raisedposition, to be able to pass across in an outward movement and drop downonto the outside of an upward-extending protrusion of the pallet onwhich the superstructure is intended to be placed.
 2. The superstructureaccording to claim 1, wherein the locking portions of the superstructureare arranged in a centre portion of each side of the second pair,wherein the centre portion relates to a portion which comprises thepositions that are closer to the first hinge joint of each side than thesecond hinge joints of each side.
 3. The superstructure according toclaim 1, wherein the superstructure in each of the four corner portionscomprises a protrusion which in a raised position of the superstructureextends above a connecting portion of the protrusion so that theprotrusion in relation to the connecting portion forms anupward-extending step, (a) wherein the connecting portion is formed as apart of the corner portion or of a connecting portion of each cornerportion of, in a raised position of the superstructure, an upper edgeportion of each side of the second pair; (b) wherein said step isarranged to interact with an edge of an upward-extending recess of a lidwhich is intended to be placed on the superstructure in such a way that,when the lid is placed with the superstructure protrusion in the recessof the lid, the interaction between the step formed by thesuperstructure protrusion and the edge of the lid recess prevents eachcorner portion from being inadvertently pushed inward along theextension of the sides of the second pair; (c) each one of the sides ofthe second pair comprising a locking portion within, in a raisedposition of the superstructure, the upper edge portion of each side; (d)wherein the locking portion is arranged to interact with a lockingportion of the lid which is intended to be placed on the superstructurein such a way that, when the superstructure is in a fully raisedposition, the interaction between the superstructure locking portion andthe lid locking portion prevents each hinge joint between the parts ofthe second pair from being inadvertently pushed inward; and (e) whereinthe locking portion is formed, in a raised position of thesuperstructure, as an upward-extending locking protrusion, and isarranged, when the superstructure is in a fully raised position, to beable to extend up into and to interact with a recess of the lid which isintended to be placed on the superstructure, or formed by the upper edgeportion having an edge which is arranged to extend up on the outside ofa downward-extending protrusion of the lid which is intended to beplaced on the superstructure.
 4. A frame system arranged to be used forsecuring a rectangular, collapsible superstructure having two oppositecollapsible sides on a rectangular pallet with four lateral edges,comprising: four recesses in which each one is arranged to be located ina respective corner of the pallet, which recesses extend down to form anupward-extending edge from the recess base, the edge being arranged toallow a protrusion of a corner portion of a superstructure to pass theedge so that the recess is able to receive the protrusion when thesuperstructure is in an upright partly or fully raised position, andwhich edge is arranged, when the protrusion is received in the recess,to interact with the protrusion and to prevent the protrusion and thecorner portion from being inadvertently pushed inward along thecollapsible sides of the superstructure; two locking portions arrangedto be located at two opposite lateral edges of the pallet, along whichtwo lateral edges the collapsible sides of the superstructure areintended to be located; the locking portions being designed with an edgeand arranged to interact with locking portions of each of thecollapsible sides of the superstructure which is intended to be placedon the pallet in such a way that, when the superstructure is in a partlyraised upright position on the pallet, the superstructure lockingportion is able to pass the edge of the frame system locking portion inan outward movement and thereby enable the superstructure to placeitself in a fully raised position, and in such a way that, when thesuperstructure is in a fully raised position, the interaction betweenthe edge of the frame system locking portion and the superstructurelocking portion prevents the superstructure collapsible sides from beinginadvertently pushed inward; and the locking portions for forming saidedge being formed as downward-extending recesses for forming anupward-extending edge from the base of each recess, each edge beingarranged to allow a downward-extending locking protrusion of eachcollapsible side of the superstructure which is intended to be placed onthe pallet to pass the edge so that the recess is able to receive thelocking protrusion when the superstructure places itself in the fullyraised position, or being formed as upward-extending protrusions, eachprotrusion, being arranged, when the superstructure is moved from apartly raised upright position to a fully raised position, to allow alower edge portion of the superstructure to pass across the protrusionin an outward movement and to drop down onto the outside of theprotrusion, which outside of the protrusion, forms said edge whichprevents the collapsible sides of the superstructure from beinginadvertently pushed inward.
 5. The frame system according to claim 4,wherein: the locking portions of the frame system are arranged to belocated in a centre portion of each lateral edge of the pallet; and thecentre portion relates to a portion which comprises the positions whichare closer to the centre of each lateral edge than the end points ofeach lateral edge.
 6. The frame system according to claim 4, wherein theframe system is formed in two separate parts which are each arranged tobe fastened on a pallet, wherein each one of the parts comprises twocorner wall portions and a locking portion arranged in between thesecorner wall portions.
 7. The frame system according to claim 4, whereinthe frame system further comprises four corner wall portions, of whicheach one is arranged to be located in a corner of the pallet, and eachone comprises a first wall portion which is arranged to extend along atleast a part of one of the lateral edges which meet in the corner inwhich the corner wall portion is located, and a second wall portionwhich is arranged to extend along at least a part of the second of thelateral edges which meet in the corner in which the corner wall portionis located.
 8. A lid arranged to be used on top of a rectangular,collapsible superstructure with two opposite collapsible sides arrangedon a pallet, the lid comprising: (a) four recesses, each one arranged tobe located in a respective corner of the superstructure and to receiveupward-extending protrusions of the superstructure, which recessesextend upward in order to form a downward-extending edge from the top ofthe recess, the edge being arranged to interact with the protrusion whenthe protrusion is received in the recess and to prevent the protrusionand the corner portion from being inadvertently pushed inward along thecollapsible sides of the superstructure; (b) two locking portionsarranged to be located at the two opposite collapsible sides of thesuperstructure; (c) the locking portions being formed with an edge andbeing arranged to interact with locking portions of each respectivecollapsible side of the superstructure on which the lid is intended tobe placed in such a way that, when the superstructure is in a fullyraised position, the interaction between the edge of the locking portionof the lid and the locking portion of the superstructure prevents thecollapsible sides of the superstructure from being inadvertently pushedinward; and (d) the locking portions for forming said edge being formedas an upward-extending recess for forming a downward-extending edge fromeach top of the respective recess, or formed as downward-extendingprotrusions, an outside of the protrusion forming said edge whichprevents the collapsible sides of the superstructure from beinginadvertently pushed inward.
 9. The lid according to claim 8, wherein:the locking portions of the lid are arranged to be located in a centreportion of each collapsible side of the superstructure; and wherein thecentre portion relates to a portion which comprises the positions whichare closer to the centre of each side than the end points of each side.10. The lid according to claim 8, wherein the lid further comprises fourcorner wall portions which are each arranged to be located in arespective corner of the superstructure, and which each comprise a firstwall portion which is arranged to extend along at least a part of one ofthe sides of the superstructure that meet in the corner in which thecorner wall portion is located, and a second wall portion which isarranged to extend along at least a part of the second of the sides ofthe superstructure that meet in the corner in which the corner wallportion is located, wherein the wall portions are arranged to form aphysical outer, geometrically rectangular limitation on outward skewingfor the corner portions of the superstructure.
 11. A load handlingsystem comprising a pallet provided with a frame system according toclaim
 4. 12. (canceled)
 13. A load handling system according to claim11, further comprising a superstructure according to claim
 1. 14. A loadhandling system according to claim 13, further comprising a lidaccording to claim
 8. 15. A load handling system according to claim 11,further comprising a lid according to claim
 8. 16. A load handlingsystem comprising a pallet provided with a superstructure according toclaim
 1. 17. The load handling system according to claim 16, furthercomprising a frame system according to claim
 4. 18. The load handlingsystem according to claim 17, further comprising a lid according toclaim 8.